package com.binyouwei.designpatterns.behavior.observer;

/**
 * @author 宾有为
 * @date 2024/7/17 19:57
 * @link https://blog.csdn.net/baidu_41616022?type=blog
 * @describe：
 **/
public abstract class Observer {
    protected ObserverSubject subject;
    public abstract void update();
}